Which of the Following Is a Linear Demand Function?
A)Q_x^d $\alpha$

Which of the following is a linear demand function?

A) Q_x^d = $\alpha$ ₀ + $\alpha$ _XP_X + $\alpha$ _YP_Y + $\alpha$ _MM + $\alpha$ _HH.
B) Q_x^d = $\alpha$ P_X ^{$\alpha$ X} P_Y ^{$\alpha$ Y} M ^{$\alpha$ M} H ^{$\alpha$ H}.
C) Q_x^d = $\alpha$ ₀ + $\alpha$ _XP_X² + $\alpha$ _YP_Y² + $\alpha$ _MM² + $\alpha$ _MH².
D) Q_x^d = $\alpha$ + $\alpha$ _X log P_X + $\alpha$ _Y log P_Y + $\alpha$ _M log M + $\alpha$ _M log H.